"I Swear, I've Killed Them All" (5) - Kill every guard in a town/city and leave.... then later return, only to find the guards have respawned.

"The Investor" (5) - Invest in all the shops in a town/city

"I Mean Business" (15) - Invest in all the shops throughout Skyrim

"Louis and Clark and Me" (10) - Discover 50 new locations

"Maybe I Should Call the Ghostbusters..." (5) - Defeat 100 ghosts

"Prison, pfft." (10) - successfully break out of prison

"Too hardcoe" (25) - Play over 300 hours

"This if MY Call of Duty: Modern Warfare 3" (15) - Play in first-person for 100 hours

" I Feel a Bit Holier Today..." (5) - visit every church in Skyrim

"Yes, I Follow A Schedule." (5) - go to bed at 10PM every night and then wake up at 6AM for a week straight

"The Bargainer" (5) - bargain a merchant so the price of the item you are trying to buy is at less than 60% of its retail value

"They Love Me So..." (10) - achieve 100 points when trying to make an NPC happy (I do not know what the points were called in Oblivion)

"Robin Hood" (10) - give every beggar in Skyrim a coin.


edit*
Sorry for double posting. While I was writing this post up, I thought someone else would have made a post before I finished my post.

"Now what..." (100) - beat all quests, preform all actions, and enter every dungeon

"Have you heard the news from the other provinces?" (10) - attempt to exit skyrim

"don't throw stones in a..." (10) - obtain a full set of glass armor

"You got that where?" (10) - obtain a full set of dadric armor

"hickey?" (5) - as a vampire, svck the blood of your marriage partner

"I feel a Bit More Holier Today..." (5) - be hit with 5 arrows in a row without dying

That ball in the sky is the sun! (play one character for 300 + hours)

"Rodney King of Skyrim" (5) - As a Redguard, be attacked by guards.

"This Isn't High School" (5) - ask every citizen in a city/town "rumor" when talking to them

"Gossip Girl" (15) - Ask every citizen throughout Skyrim "rumor" when talking to them

"Yes, GPS Was Invented Back Then..." (5) - Use the "waypoint" system 100 times (You must actually go to your location)

"Waiting For My Real LIfe To Begin..." (5) - Stay in your home for more than 24 (IRL) hours

"Afraid of the Dark" (5) - hold a torch (at night time) for 10 (IRL) hours

"It Never Sleeps" (10) - avoid sleeping/resting/waiting for a whole week

"Bear Jew" (5) - kill 1000 enemies with a blunt weapon

"I Smell A Troll" - Blatantly deny your true Dragon-Born potential to Esbern, and berate him for it.

I think this is the best one so far.

Shop-o-holic - buy 1000 items

The Fargoth/Adoring Fan acheivement - get 500 NPC's disposition to under 25

"I'm so special" (1) Spent first hour of the game bumping into the same wall over and over again.

I'M a WHAT NOW ! - (15G) - become a werewolf OR vampire
Okay now this is just too much ! - (15G) - become a werewolf AND a vampire at the same time

"Master of the shout" (40) - obtain all dragon shouts
"Stairs are for squares" (5) - fast travel to the throat of the world
"Haven't i seen you before" (5) - find and talk to M'aiq the Liar
"Top of the food chain" (10) - kill a dragon as a werewolf (assuming they're in the game)

?(?益??)

-Stop right there criminal scum! = Freeze when a guard tells you to.
-Heart breaker = Be married to 2 NPCs at the same time.
-Grim Reaper = Capture 50 souls.
-Rivers of Blood = Spill 20 gallons of Daedric blood.
-Treasure Hunter = Loot 50 dungeons.
-Legend = Kill 5 enemies without being damaged.
-Horseman = Ride 100 miles/around 160 Kilometers.
-Predator = Kill a monster using envieromental damage.
-Death Dealer = Kill 100 NPCs while enlisted on Dark Brotherhood

More Fearsome Then You- Killed by a Mudcrab

The Day The Music Died- Kill a Lute Player

>12 Parsecs- Run from Solsthiem to Solitude in under 24 Hours

Dream Come True- Stand on The Back of a Fallen Dragon

Stop...- Kill 4 people will a warhammer in Rapid succession

A Lovely Song/The Prince that was Promised- As a mage, kill an enemy using both Ice and Fire magic.

But... Where are the Tentacles?- Kill a Bear.

I'll have more later.

Born to be Fabulous (10g) - Wear every item of clothing or armor at least once.

Whee! (20g) - Jump off of the Throat of the World and survive.

Speak Softly... (10g) - Succeed in X amount of admirations (or whatever Skyrim will have).

...And carry a big stick (10g) - Succeed in X amount of intimidations (if Skyrim has them).

Yeah, you wanna fight about it?! (5g) - Successfully taunt an NPC (if Skyrim has taunting or some equivalent).

Flying High (5g) - Get addicted to any substance.

At least I still have my dignity! (5g) - Take and complete a quest while completely naked (not including weapons).

It's not Cheating, I just have lots of love! (10g) - Get married while you are married.

Sheogorath would be Proud (20g) - Fight and kill a dragon using only The Fork of Horripulation.

I fought the Law... (10g) - Resist arrest for 30 minutes straight.

Are you sure this is safe? (5g) - Eat an alchemical ingredient without knowing any of its effects

We are Legion (10g) - Get as many followers as possible

Let's Experiment! (5g) - Crossdress! (Assuming there's crossdressing in the game)

It's just a harmless little bunny, isn't it? (5g) - Kill a bunny.

Arachnophobe (10g) - Kill 10 Giant Frostbite Spiders

I knew they were dirty... (10g) - Contract a disease from a beggar (This was actually possible in Oblivion!)

It's like a family reunion! (5g) - Kill a zombie of your own race (I hated how in Oblivion all of the zombies and skeletons looked the same. Made no sense in a game with multiple races).

GLARGH! (5g) - Fail X amount of speech challenges (assuming they are in Skyrim).

Don't shoot me, bro! (5g) - Make an enemy shoot one of their allies with an arrow

That's just a myth! (20g) - Disprove all of the myths about vampires (Garlic, walking over running water, sunlight, reflection, etc)

How do you disprove something that's True?

We Just Had To Shove It Down Your Throat - Play for 300 hours without acquiring any achievement... until now.

The Only Reasonable Person - Finish the main questline choosing only the most sarcastic responses in dialogues.

Surprise! - Attempt to summon a Daedric Prince on a rainy day and get Sheogorath instead.

I Did It All Against My Will... - Finish the main questline choosing only the most unwilling and ungrateful responses in dialogues.

Tradition Must Live On - Encounter a bug on the first day of playing the game.

Zero-Sum - As a master of Speechcraft, finish the main questline by tricking Alduin into unthinking himself.

Yet Another Dragon... - Ignore a dragon encounter.

These Bones Must Be Glued Together! - Hit a skeleton with a giant hammer and witness how much effect on it it doesn't have.

I Don't Believe Them! - Count every single of the seven thousand steps.

Eyyyyyy! cool someone liked my acheivement ideas!

Edit : Read over some of the responses , I like a few of the ones Gjyrhon (Spelling?) (Guy with the wolf avatar) had said. The one about "I'm to drive to drunk" and "Racist bastard" were really funny ones

I wanted to do an achievement with kids but I don't think we are allowed to harm childeren in anyway in skyrim so I'll do some other one's

Your being ridiculous:become every possible combination of were creature/weresheep,weregoblin,weredragons,weredaedroth's were werewolves and werewisp

truly truly truly outrageous:become a were creature of inanimate objects/werefork,weresword,werespear,werebow,wererock and wereflowers
the first two achievements I said WERE jokes if you havn't figured it out.

the old ball and chain:get married

bully:beat the living Sh!t out of 50 children for being immortal

you think you better then me what my way of life ain't good enough for you?:become a nord and kill 10 of every other race except your own.

little bunny foo foo hopping through the forest scooping up the field mice and booping them on the head:kill 1000 rabbits

The adoring fan massacre:give the adoring fan grade A weapons and put him under the spell frenzy inside the largest city in skyrim

Financial business: 1 kill over 100 dragons 2 ??????? 3 PROFIT!

I'm New - Die in the tutorial.

If there is a tutorial.

YES

"Misery enjoys company" (10) - Poison an enemy from which you recieved a disease from.

'...you're locked up in here with me.' - Kill five other prisoners after going to prison.

"VERY Special Friend" (10) - marry Ahnassi

"Colder than a witch's..." (5) - Kill 100 monsters with a ice based attack

please o please let ahnassi be in the game! ~oh she can't be still alive~ well what if the stuff you collected for her was a for a potion of immortality!